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Module1 reading

Module1 reading
Module1 reading

学校:临清实验高中学科:英语编写人:王珂审稿人:宋志君Book1 Module 1 My first day at senior high(导学案)

课前预习学案

一、预习目标

预习Vocabulary and Reading,通过阅读,让学生对班级、教师、学生以及学校等情况英语表达有一个初步的了解。

二、预习内容

1 Do exercises of the introduction.

2 Read the text and do Exercise 2and 3.

三、提出疑惑

Write down the problems you cannot settle after learning the text independently.

(1)

(2)

(3)

课内探究学案

一、学习目标

1.知识目标

Get the students to learn and grasp the following important useful new words and expressions in the part:

Learn the language in this part and train the students in the reading comprehension.

2.能力目标

1) Improve the Ss’ ability in readi ng.

2) Train the Ss to grasp the meaning of the words from the context.

3.情感目标

Learning to love the new high school life and forming positive attitude towards language learning in new surroundings.

教学重难点

重点:let the students learn how to introduce their school and their school life.

难点:Know different school systems of different countries.

二、学习过程

Step1. Ask and answer in pairs

(1). What are the main differences between Junior High school and Senior High School?

(2). Can you say something about your Junior High School?

(3).Would you tell me your thoughts about your first day at Senior High School?

Step2. Skimming

What is the main idea of the passage? https://www.wendangku.net/doc/b76017005.html,

A. Li just likes his English teacher.

B. Li not only likes his former school but his present one.

C. Li describes his impression on his new class and English teacher.

D. Li mainly introduced himself to his classmates.

Step3.Fast-reading

1) Find something about this school which is different from Li Kang’s Junior High School.

2) Find two things that the English teacher thinks are important to do in class.

3) Find two things that the English teacher wants to improve.

True or False

1). Li Kang lives in our capital, Beijing.

2). It is his first day at Junior High school.

3). Li Kang knows why his new school is good.

4). Ms. Shen is very enthusiastic to her students.

5). Li Kang likes Ms. Shen’s attitude, but the others don’t.

Which is t he best summary of Li Kang’s opinion about the new school?

1. Li Kang’s new school is very different from his old school. There is a new technology class. Everyone in the class works hard.

2. Li Kang is very impressed with the teachers and the technology in his new school. The English teacher’s method is very different from that in his old school and very interesting. The class is bigger and the students work hard.

Step5. Post-reading

Choose the answers with the same meaning as the sentences from the text.

1). Lines 21-24: Ms Shen’s method of teach- ing is nothing like that of the teachers at my Junior High school.

2). Lines 27-28: I don’t think I will be bored in Ms Shen’s class!

3). Lines 31-32: Some students were embarrassed at first …

4). Lines 33-35: Ms Shen gave us instruc-tions and then we worked by ourselves.

Step6. Discussion

1). Is our English classroom like Li Kang’s?

2). Is our class the same size as his? Is the number of boys and girls the same?

3). Are you looking forward to doing your English homework?

Step7. Homework新课标xk b1. c om

Write a one-hundred-word article to describe your senior high school, such as your classroom, your English teacher and your lessons.

三、反思总结

Describe a teacher you like best in the passage and show your composition to your classmates in fornt of the class.

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

四、当堂检测

重点短语

1 与…相似________________

2 对…的态度________________

3 把某人介绍给某人______________ 4成组的______________________

5 独自的______________________ 6参加____________________

7 换句话说____________________ 8 期盼,盼望_______________

9 上大学_____________________ 10 …的数量 __________________

11. 在… 开始的时候__________________ 12. 在..结束的时候__________________ 13. 被分割为_____________________ 14. 写下,记下________________

15. 一点不像_______________________ 16. 厌烦厌倦_______________

17. 各种各样的______________ 18 玩得高兴_____________

19 使某人铭记_________________ 20.一个叫露丝的女孩 ________________

课后练习与提高

单选

1—W hy did you get up so early ?X k b 1 . c o m

---I would not like ______late again.

A to be caught being

B to catch being

C being caught being

D catching being

2 Our bodies are strengthened by taking exercise,______ our minds are developed

by learning.

A probably

B likely

C similarly

3 When first _____ to the market, these products enjoyed great success.

A introducing

B introduced

C introduce

D being introduced

4 I don’t think she can win the first prize,______”

A do I

B don’t I

C can she

D can’t she

5 ——You forgot your purse when you went out.

——Good heavens,__________

A So did I

B So I did

C I did so

D I so did

6 ____and happy, Tom stood up and accepted the prize.

A surprising

B surprised

C Being surprised

D To be surprising

7 I wonder if you mind me _____ a few questions about your family?

A to ask

B asking

C ask

D asked

8 ---Are you feeling tired after the game?

--_______ In fact, I can join another one

A Not at all

B Not a little

C A little bit

D Quite a bit

9 You say he works hard,______ and _______

A So he does So you do

B So he does So do you

C So does he, So do you

D So does he so you do

10 By the time the police arrived ,the thief ______

A had disappeared

B was disappeared

C had been disappeared

D has disappeared

11 ______with a table cloth, the table looks nice.

A covering

B Covered

C Having covered

D Having been covered

12 There will be a discussion tomorrow, all those who want to _____, please raise your hands.

A join

B take part

C take a part D. take part in

13 They will fly to Washington, _____they plan to stay for two or three days.

A where

B there

C which

D when

14 Last week, only two people came to look at the house, ______wanted to buy it.

A none of them

B both of whom

C none of whom

D neither of them

当堂检测答案:

1.be similar to

2. attitude to/towards

3. introduce sb to sb

4. in groups

5. by oneself

6. take part in

7. in other words

8. look forwards to

9. go to college 10. the number of 11. at the start of 12. at the end of 13. be divided into 14. write down15. nothing like 16. be bored with 17. all kinds of 18. have fun 19. impress sth on sb 20.

a girl called Lucy

课后练习与提高答案:

1-5 CCBCB 6-10 BBABA 11-14 BBAB

清华大学《控制工程基础》课件-4

则系统闭环传递函数为 假设得到的闭环传递函数三阶特征多项式可分解为 令对应项系数相等,有 二、高阶系统累试法 对于固有传递函数是高于二阶的高阶系统,PID校正不可能作到全部闭环极点的任意配置。但可以控制部分极点,以达到系统预期的性能指标。 根据相位裕量的定义,有 则有 则 由式可独立地解出比例增益,而后一式包含两个未知参数和,不是唯一解。通常由稳态误差要求,通过开环放大倍数,先确定积分增益,然后计算出微分增益。同时通过数字仿真,反复试探,最后确定、和三个参数。 设单位反馈的受控对象的传递函数为 试设计PID控制器,实现系统剪切频率 ,相角裕量。 解: 由式,得 由式,得 输入引起的系统误差象函数表达式为

令单位加速度输入的稳态误差,利用上式,可得 试探法 采用试探法,首先仅选择比例校正,使系统闭环后满足稳定性指标。然后,在此基础上根据稳态误差要求加入适当参数的积分校正。积分校正的加入往往使系统稳定裕量和快速性下降,此时再加入适当参数的微分校正,保证系统的稳定性和快速性。以上过程通常需要循环试探几次,方能使系统闭环后达到理想的性能指标。 齐格勒-尼柯尔斯法 (Ziegler and Nichols ) 对于受控对象比较复杂、数学模型难以建立的情况,在系统的设计和调试过程中,可以考虑借助实验方法,采用齐格勒-尼柯尔斯法对PID调节器进行设计。用该方法系统实现所谓“四分之一衰减”响应(”quarter-decay”),即设计的调节器使系统闭环阶跃响应相临后一个周期的超调衰减为前一个周期的25%左右。 当开环受控对象阶跃响应没有超调,其响应曲线有如下图的S形状时,采用齐格勒-尼柯尔斯第一法设定PID参数。对单位阶跃响应曲线上斜率最大的拐点作切线,得参数L 和T,则齐格勒-尼柯尔斯法参数设定如下: (a) 比例控制器: (b) 比例-积分控制器: , (c) 比例-积分-微分控制器: , 对于低增益时稳定而高增益时不稳定会产生振荡发散的系统,采用齐格勒-尼柯尔斯第二法(即连续振荡法)设定参数。开始只加比例校正,系统先以低增益值工作,然后慢慢增加增益,直到闭环系统输出等幅度振荡为止。这表明受控对象加该增益的比例控制已达稳定性极限,为临界稳定状态,此时测量并记录振荡周期Tu和比例增益值Ku。然后,齐格勒-尼柯尔斯法做参数设定如下: (a) 比例控制器:

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